Office (OLE) / .DOC malware analysis — malicious · e5224679572a2d80

MALICIOUS

Office (OLE) / .DOC

1.66 MB First seen: 2022-11-26

MD5: b32199e6222c5271fa5bc0389adbe69c SHA-1: 732826d7a86e5122ccca88ff06829b8555ef3cf0 SHA-256: e5224679572a2d805880aa3cb43edb4a51a547ca3a0aad967da72130ebf6db67

142 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1559.002 Component Object Model Hijacking

The sample contains an embedded Equation Editor OLE object that is known to be vulnerable to CVE-2017-11882. This exploit typically delivers a second-stage payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may also be attempting to trick the user into opening a password-protected archive, which is a common delivery method for malware.

Heuristics 4

Equation Editor Ole10Native payload — CVE-2017-11882 critical CVE likely CVE_2017_11882_EQUATION_OLE10NATIVE

An embedded Microsoft Equation 3.0 object (CLSID 0002CE02-0000-0000-C000-000000000046) carries an Ole10Native packager stream instead of the normal Equation Native/MTEF data. This is the weaponized Equation Editor RCE delivery shape used by CVE-2017-11882 / CVE-2018-0802 maldocs. The payload (font-record overflow + shellcode) is frequently encrypted and the stream name case-scrambled to evade scanners, but an Equation object holding an Ole10Native stream has no benign use.
Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin` `c67026c3faf0e8bf94e5cfaa2c3838a4d6223ab88c49d09a4746b0b6155a01f1`	ole-package	OLE Ole10Native stream: OlE10nATivE	1725229 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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